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抗裂剂对低胶材自密实混凝土性能影响的试验研究
作者：饶志刚1，温金保2，3，4，祝烨然2，3，4，夏强2，3，4，唐修生2，3，4，杜志芹2，3，4，刘兴荣2，3，4
（1.常州市港航事业发展中心，江苏 常州 213000；2.南京水利科学研究院，江苏 南京 210029；
3.南京瑞迪高新技术有限公司，江苏 南京 210024；4.水利部水工新材料工程技术研究中心，江苏 南京 210024）
摘要：研究了抗裂剂对低胶材自密实混凝土工作性能、力学性能、干缩性能及耐久性能的影响，结果表明，抗裂剂的掺入对低胶材自密实混凝土的工作性能影响较小，但较未掺抗裂剂时，28 d劈拉强度与拉压比分别提高了9.8%、11.7%，28、60 d干缩率分别降低了52.6%、45.1%，相对渗透性系数则降低了69%，56 d氯离子扩散系数降低了33.1%。
关键词：抗裂剂；低胶材自密实混凝土；干燥收缩；相对渗透性系数；氯离子扩散系数
中图分类号：TU528.32 文献标识码：A 文章编号：1001-702X（2022）10-0098-04
Experimental study on the effect of anti-cracking agent on the performance of self-compacting concrete of low amount cementitious materials
RAO Zhigang1，WEN Jinbao2，3，4，ZHU Yeran2，3，4，XIA Qiang2，3，4，TANG Xiusheng2，3，4，DU Zhiqin2，3，4，LIU Xingrong2，3，4
（1.Changzhou Port and Waterway Development Center，Changzhou 213000，China；
2.Nanjing Hydraulic Research Institute，Nanjing 210029，China；
3.Nanjing R ＆ D Hi-Tech Co. Ltd.，Nanjing 210024，China；
3.Nanjing R ＆ D Hi-Tech Co. Ltd.，Nanjing 210024，China；
4.Research Center on New Materials in Hydraulic Structures of Ministry of Water Resources，Nanjing 210024，China）
Abstract：The effects of anti-cracking agent on the working performance, strength performance, dry shrinkage performance and durability of self-compacting concrete with low adhesive material were studied. The results showed that the effect of anti-cracking agent on the working performance of self-compacting concrete with low adhesive material was small，but the 28 days splitting strength and tension-compression ratio increased by 9.8% and 11.7%, respectively. At 28 and 60 days，the shrinkage rate was reduced by 52.6% and 45.1%，the relative permeability coefficient was reduced by 69%，and the chloride diffusion coefficient at 56 days was reduced by 33.1%.
Key words：anti-cracking agent，self-compacting concrete in low amount cementitious materials，drying shrinkage，relative permeability coefficient，chloride diffusion coefficient